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fix: SFI issue fix #390

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Merged
merged 5 commits into from
Aug 22, 2025
Merged

fix: SFI issue fix #390

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6ae0800
sfi issue fix
Ravikirana-Microsoft Aug 21, 2025
354ec37
condition removed
Ravikirana-Microsoft Aug 21, 2025
8145d53
path update
Ravikirana-Microsoft Aug 21, 2025
ff0847d
path updated
Ravikirana-Microsoft Aug 21, 2025
730f556
form-data security issue fix
Ravikirana-Microsoft Aug 22, 2025
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11 changes: 6 additions & 5 deletions src/frontend/frontend_server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,13 +50,14 @@ async def get_config():

@app.get("/{full_path:path}")
async def serve_app(full_path: str):
# First check if file exists in build directory
file_path = os.path.join(BUILD_DIR, full_path)
if os.path.exists(file_path):
# Remediation: normalize and check containment before serving
file_path = os.path.normpath(os.path.join(BUILD_DIR, full_path))
# Block traversal and dotfiles
if not file_path.startswith(BUILD_DIR) or ".." in full_path or "/." in full_path or "\\." in full_path:
return FileResponse(INDEX_HTML)
if os.path.isfile(file_path):
return FileResponse(file_path)
# Otherwise serve index.html for client-side routing
return FileResponse(INDEX_HTML)


if __name__ == "__main__":
uvicorn.run(app, host="127.0.0.1", port=3000)
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